这需要在脖子处切割一个小切口，如此导尿管就能被传送给冠动脉。
This involves a small incision being made in the neck, so that a catheter can be fed down towards the coronary arteries.
目的研究切割球囊成形术（CBA）治疗高龄患者弥漫性冠状动脉（冠脉）支架内再狭窄（ISR）的安全性与疗效。
Objective To evaluate the safety and efficacy of cutting balloon angioplasty (CBA) for diffuse in-stent restenosis (ISR) in elderly patients.
目的研究切割球囊在冠状动脉介入治疗中的有效性和安全性。
Objective To study the efficacy and safety of the use of cutting balloon in coronary intervention.
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